4639090 has 16 divisors (see below), whose sum is σ = 8508888. Its totient is φ = 1820416.

The previous prime is 4639081. The next prime is 4639099. The reversal of 4639090 is 909364.

It is an interprime number because it is at equal distance from previous prime (4639081) and next prime (4639099).

It can be written as a sum of positive squares in 4 ways, for example, as 4549689 + 89401 = 2133^2 + 299^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4639099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3847 + ... + 4906.

Almost surely, 2^4639090 is an apocalyptic number.

4639090 is a deficient number, since it is larger than the sum of its proper divisors (3869798).

4639090 is a wasteful number, since it uses less digits than its factorization.

4639090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8813.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 4639090 is about 2153.8546840490. The cubic root of 4639090 is about 166.7801138720.

The spelling of 4639090 in words is "four million, six hundred thirty-nine thousand, ninety".